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Add permission to manifiest:

<pre style="background-image: URL(http://2.bp.blogspot.com/_z5ltvMQPaa8/SjJXr_U2YBI/AAAAAAAAAAM/46OqEP32CJ8/s320/codebg.gif); background: #f0f0f0; border: 1px dashed #CCCCCC; color: black; font-family: arial; font-size: 12px; height: auto; line-height: 20px; overflow: auto; padding: 0px; text-align: left; width: 99%;"> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="...">
<uses-permission android:name="android.permission.VIBRATE"/>
<application android:label="...">
...
</application>
</manifest>
</pre>

And make the vibration in code:
<div class="syntaxhighlighter nogutter " id="highlighter_562327" style="background-color: white; background-image: none !important; border-width: 0px !important; bottom: auto !important; color: #4e4e4e; direction: ltr !important; float: none !important; font-family: Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important; font-size: 13px; height: auto !important; left: auto !important; line-height: 1.1em !important; margin: 1em 0px !important; outline: 0px !important; padding: 1px !important; position: relative !important; right: auto !important; top: auto !important; vertical-align: baseline !important; width: 607px;"><div class="lines" style="background-image: none !important; border-width: 0px !important; bottom: auto !important; direction: ltr !important; float: none !important; font-size: 1em !important; height: auto !important; left: auto !important; line-height: 1.1em !important; margin: 0px !important; outline: 0px !important; padding: 0px !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; width: auto !important;"><div class="line alt1" style="background-image: none !important; border-width: 0px !important; bottom: auto !important; direction: ltr !important; float: none !important; font-size: 1em !important; height: auto !important; left: auto !important; line-height: 1.1em !important; margin: 0px !important; outline: 0px !important; padding: 0px !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; width: auto !important;">
</div></div></div><pre style="background-image: URL(http://2.bp.blogspot.com/_z5ltvMQPaa8/SjJXr_U2YBI/AAAAAAAAAAM/46OqEP32CJ8/s320/codebg.gif); background: #f0f0f0; border: 1px dashed #CCCCCC; color: black; font-family: arial; font-size: 12px; height: auto; line-height: 20px; overflow: auto; padding: 0px; text-align: left; width: 99%;"> // Get instance of Vibrator from current Context
Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
// Vibrate for 300 milliseconds
v.vibrate(300);
</pre>
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